2 use rustc::hir::intravisit;
3 use rustc::session::{self, config, DiagnosticOutput};
4 use rustc::util::common::ErrorReported;
5 use rustc_data_structures::sync::Lrc;
6 use rustc_feature::UnstableFeatures;
7 use rustc_interface::interface;
8 use rustc_span::edition::Edition;
9 use rustc_span::source_map::SourceMap;
10 use rustc_span::symbol::sym;
11 use rustc_span::{BytePos, FileName, Pos, Span, DUMMY_SP};
12 use rustc_target::spec::TargetTriple;
14 use std::io::{self, Write};
16 use std::path::PathBuf;
17 use std::process::{self, Command, Stdio};
20 use syntax::with_globals;
21 use tempfile::Builder as TempFileBuilder;
24 use crate::clean::Attributes;
25 use crate::config::Options;
26 use crate::html::markdown::{self, ErrorCodes, Ignore, LangString};
28 #[derive(Clone, Default)]
29 pub struct TestOptions {
30 /// Whether to disable the default `extern crate my_crate;` when creating doctests.
31 pub no_crate_inject: bool,
32 /// Whether to emit compilation warnings when compiling doctests. Setting this will suppress
33 /// the default `#![allow(unused)]`.
34 pub display_warnings: bool,
35 /// Additional crate-level attributes to add to doctests.
36 pub attrs: Vec<String>,
39 pub fn run(options: Options) -> i32 {
40 let input = config::Input::File(options.input.clone());
42 let crate_types = if options.proc_macro_crate {
43 vec![config::CrateType::ProcMacro]
45 vec![config::CrateType::Dylib]
48 let sessopts = config::Options {
49 maybe_sysroot: options.maybe_sysroot.clone(),
50 search_paths: options.libs.clone(),
52 cg: options.codegen_options.clone(),
53 externs: options.externs.clone(),
54 unstable_features: UnstableFeatures::from_environment(),
55 lint_cap: Some(::rustc::lint::Level::Allow),
56 actually_rustdoc: true,
57 debugging_opts: config::DebuggingOptions { ..config::basic_debugging_options() },
58 edition: options.edition,
59 target_triple: options.target.clone(),
60 ..config::Options::default()
63 let mut cfgs = options.cfgs.clone();
64 cfgs.push("doc".to_owned());
65 cfgs.push("doctest".to_owned());
66 let config = interface::Config {
68 crate_cfg: interface::parse_cfgspecs(cfgs),
74 diagnostic_output: DiagnosticOutput::Default,
76 crate_name: options.crate_name.clone(),
77 lint_caps: Default::default(),
79 override_queries: None,
80 registry: rustc_driver::diagnostics_registry(),
83 let mut test_args = options.test_args.clone();
84 let display_warnings = options.display_warnings;
86 let tests = interface::run_compiler(config, |compiler| {
87 compiler.enter(|queries| {
88 let lower_to_hir = queries.lower_to_hir()?;
90 let mut opts = scrape_test_config(lower_to_hir.peek().0.krate());
91 opts.display_warnings |= options.display_warnings;
92 let enable_per_target_ignores = options.enable_per_target_ignores;
93 let mut collector = Collector::new(
94 queries.crate_name()?.peek().to_string(),
98 Some(compiler.source_map().clone()),
100 enable_per_target_ignores,
103 let mut global_ctxt = queries.global_ctxt()?.take();
105 global_ctxt.enter(|tcx| {
106 let krate = tcx.hir().krate();
107 let mut hir_collector = HirCollector {
108 sess: compiler.session(),
109 collector: &mut collector,
111 codes: ErrorCodes::from(
112 compiler.session().opts.unstable_features.is_nightly_build(),
115 hir_collector.visit_testable("".to_string(), &krate.attrs, |this| {
116 intravisit::walk_crate(this, krate);
120 let ret: Result<_, ErrorReported> = Ok(collector.tests);
124 .expect("compiler aborted in rustdoc!");
126 test_args.insert(0, "rustdoctest".to_string());
131 Some(testing::Options::new().display_output(display_warnings)),
137 // Look for `#![doc(test(no_crate_inject))]`, used by crates in the std facade.
138 fn scrape_test_config(krate: &::rustc::hir::Crate) -> TestOptions {
139 use syntax::print::pprust;
142 TestOptions { no_crate_inject: false, display_warnings: false, attrs: Vec::new() };
144 let test_attrs: Vec<_> = krate
147 .filter(|a| a.check_name(sym::doc))
148 .flat_map(|a| a.meta_item_list().unwrap_or_else(Vec::new))
149 .filter(|a| a.check_name(sym::test))
151 let attrs = test_attrs.iter().flat_map(|a| a.meta_item_list().unwrap_or(&[]));
154 if attr.check_name(sym::no_crate_inject) {
155 opts.no_crate_inject = true;
157 if attr.check_name(sym::attr) {
158 if let Some(l) = attr.meta_item_list() {
160 opts.attrs.push(pprust::meta_list_item_to_string(item));
169 /// Documentation test failure modes.
171 /// The test failed to compile.
173 /// The test is marked `compile_fail` but compiled successfully.
174 UnexpectedCompilePass,
175 /// The test failed to compile (as expected) but the compiler output did not contain all
176 /// expected error codes.
177 MissingErrorCodes(Vec<String>),
178 /// The test binary was unable to be executed.
179 ExecutionError(io::Error),
180 /// The test binary exited with a non-zero exit code.
182 /// This typically means an assertion in the test failed or another form of panic occurred.
183 ExecutionFailure(process::Output),
184 /// The test is marked `should_panic` but the test binary executed successfully.
196 as_test_harness: bool,
197 runtool: Option<String>,
198 runtool_args: Vec<String>,
199 target: TargetTriple,
201 mut error_codes: Vec<String>,
204 ) -> Result<(), TestFailure> {
205 let (test, line_offset) = make_test(test, Some(cratename), as_test_harness, opts, edition);
207 // FIXME(#44940): if doctests ever support path remapping, then this filename
208 // needs to be the result of `SourceMap::span_to_unmapped_path`.
209 let path = match filename {
210 FileName::Real(path) => path.clone(),
211 _ => PathBuf::from(r"doctest.rs"),
215 Temp(tempfile::TempDir),
220 fn path(&self) -> &std::path::Path {
222 DirState::Temp(t) => t.path(),
223 DirState::Perm(p) => p.as_path(),
228 let outdir = if let Some(mut path) = options.persist_doctests {
231 filename.to_string().rsplit('/').next().unwrap().replace(".", "_"),
234 std::fs::create_dir_all(&path).expect("Couldn't create directory for doctest executables");
239 TempFileBuilder::new()
240 .prefix("rustdoctest")
242 .expect("rustdoc needs a tempdir"),
245 let output_file = outdir.path().join("rust_out");
247 let rustc_binary = options
251 .unwrap_or_else(|| rustc_interface::util::rustc_path().expect("found rustc"));
252 let mut compiler = Command::new(&rustc_binary);
253 compiler.arg("--crate-type").arg("bin");
254 for cfg in &options.cfgs {
255 compiler.arg("--cfg").arg(&cfg);
257 if let Some(sysroot) = options.maybe_sysroot {
258 compiler.arg("--sysroot").arg(sysroot);
260 compiler.arg("--edition").arg(&edition.to_string());
261 compiler.env("UNSTABLE_RUSTDOC_TEST_PATH", path);
262 compiler.env("UNSTABLE_RUSTDOC_TEST_LINE", format!("{}", line as isize - line_offset as isize));
263 compiler.arg("-o").arg(&output_file);
265 compiler.arg("--test");
267 for lib_str in &options.lib_strs {
268 compiler.arg("-L").arg(&lib_str);
270 for extern_str in &options.extern_strs {
271 compiler.arg("--extern").arg(&extern_str);
273 compiler.arg("-Ccodegen-units=1");
274 for codegen_options_str in &options.codegen_options_strs {
275 compiler.arg("-C").arg(&codegen_options_str);
277 for debugging_option_str in &options.debugging_options_strs {
278 compiler.arg("-Z").arg(&debugging_option_str);
281 compiler.arg("--emit=metadata");
283 compiler.arg("--target").arg(target.to_string());
286 compiler.stdin(Stdio::piped());
287 compiler.stderr(Stdio::piped());
289 let mut child = compiler.spawn().expect("Failed to spawn rustc process");
291 let stdin = child.stdin.as_mut().expect("Failed to open stdin");
292 stdin.write_all(test.as_bytes()).expect("could write out test sources");
294 let output = child.wait_with_output().expect("Failed to read stdout");
296 struct Bomb<'a>(&'a str);
297 impl Drop for Bomb<'_> {
299 eprint!("{}", self.0);
302 let out = str::from_utf8(&output.stderr).unwrap();
303 let _bomb = Bomb(&out);
304 match (output.status.success(), compile_fail) {
306 return Err(TestFailure::UnexpectedCompilePass);
310 if !error_codes.is_empty() {
311 error_codes.retain(|err| !out.contains(&format!("error[{}]: ", err)));
313 if !error_codes.is_empty() {
314 return Err(TestFailure::MissingErrorCodes(error_codes));
319 return Err(TestFailure::CompileError);
330 if let Some(tool) = runtool {
331 cmd = Command::new(tool);
332 cmd.arg(output_file);
333 cmd.args(runtool_args);
335 cmd = Command::new(output_file);
339 Err(e) => return Err(TestFailure::ExecutionError(e)),
341 if should_panic && out.status.success() {
342 return Err(TestFailure::UnexpectedRunPass);
343 } else if !should_panic && !out.status.success() {
344 return Err(TestFailure::ExecutionFailure(out));
352 /// Transforms a test into code that can be compiled into a Rust binary, and returns the number of
353 /// lines before the test code begins.
356 cratename: Option<&str>,
357 dont_insert_main: bool,
360 ) -> (String, usize) {
361 let (crate_attrs, everything_else, crates) = partition_source(s);
362 let everything_else = everything_else.trim();
363 let mut line_offset = 0;
364 let mut prog = String::new();
366 if opts.attrs.is_empty() && !opts.display_warnings {
367 // If there aren't any attributes supplied by #![doc(test(attr(...)))], then allow some
368 // lints that are commonly triggered in doctests. The crate-level test attributes are
369 // commonly used to make tests fail in case they trigger warnings, so having this there in
370 // that case may cause some tests to pass when they shouldn't have.
371 prog.push_str("#![allow(unused)]\n");
375 // Next, any attributes that came from the crate root via #![doc(test(attr(...)))].
376 for attr in &opts.attrs {
377 prog.push_str(&format!("#![{}]\n", attr));
381 // Now push any outer attributes from the example, assuming they
382 // are intended to be crate attributes.
383 prog.push_str(&crate_attrs);
384 prog.push_str(&crates);
386 // Uses libsyntax to parse the doctest and find if there's a main fn and the extern
387 // crate already is included.
388 let result = rustc_driver::catch_fatal_errors(|| {
389 with_globals(edition, || {
390 use errors::emitter::EmitterWriter;
392 use rustc_parse::maybe_new_parser_from_source_str;
393 use rustc_span::source_map::FilePathMapping;
394 use syntax::sess::ParseSess;
396 let filename = FileName::anon_source_code(s);
397 let source = crates + &everything_else;
399 // Any errors in parsing should also appear when the doctest is compiled for real, so just
400 // send all the errors that libsyntax emits directly into a `Sink` instead of stderr.
401 let cm = Lrc::new(SourceMap::new(FilePathMapping::empty()));
403 EmitterWriter::new(box io::sink(), None, false, false, false, None, false);
404 // FIXME(misdreavus): pass `-Z treat-err-as-bug` to the doctest parser
405 let handler = Handler::with_emitter(false, None, box emitter);
406 let sess = ParseSess::with_span_handler(handler, cm);
408 let mut found_main = false;
409 let mut found_extern_crate = cratename.is_none();
410 let mut found_macro = false;
412 let mut parser = match maybe_new_parser_from_source_str(&sess, filename, source) {
415 for mut err in errs {
419 return (found_main, found_extern_crate, found_macro);
424 match parser.parse_item() {
427 if let ast::ItemKind::Fn(..) = item.kind {
428 if item.ident.name == sym::main {
434 if !found_extern_crate {
435 if let ast::ItemKind::ExternCrate(original) = item.kind {
436 // This code will never be reached if `cratename` is none because
437 // `found_extern_crate` is initialized to `true` if it is none.
438 let cratename = cratename.unwrap();
441 Some(name) => found_extern_crate = name.as_str() == cratename,
442 None => found_extern_crate = item.ident.as_str() == cratename,
448 if let ast::ItemKind::Mac(..) = item.kind {
453 if found_main && found_extern_crate {
465 (found_main, found_extern_crate, found_macro)
468 let (already_has_main, already_has_extern_crate, found_macro) = match result {
469 Ok(result) => result,
470 Err(ErrorReported) => {
471 // If the parser panicked due to a fatal error, pass the test code through unchanged.
472 // The error will be reported during compilation.
473 return (s.to_owned(), 0);
477 // If a doctest's `fn main` is being masked by a wrapper macro, the parsing loop above won't
478 // see it. In that case, run the old text-based scan to see if they at least have a main
479 // function written inside a macro invocation. See
480 // https://github.com/rust-lang/rust/issues/56898
481 let already_has_main = if found_macro && !already_has_main {
484 let comment = line.find("//");
485 if let Some(comment_begins) = comment { &line[0..comment_begins] } else { line }
487 .any(|code| code.contains("fn main"))
492 // Don't inject `extern crate std` because it's already injected by the
494 if !already_has_extern_crate && !opts.no_crate_inject && cratename != Some("std") {
495 if let Some(cratename) = cratename {
496 // Make sure its actually used if not included.
497 if s.contains(cratename) {
498 prog.push_str(&format!("extern crate {};\n", cratename));
504 // FIXME: This code cannot yet handle no_std test cases yet
505 if dont_insert_main || already_has_main || prog.contains("![no_std]") {
506 prog.push_str(everything_else);
508 let returns_result = everything_else.trim_end().ends_with("(())");
509 let (main_pre, main_post) = if returns_result {
511 "fn main() { fn _inner() -> Result<(), impl core::fmt::Debug> {",
512 "}\n_inner().unwrap() }",
515 ("fn main() {\n", "\n}")
517 prog.extend([main_pre, everything_else, main_post].iter().cloned());
521 debug!("final doctest:\n{}", prog);
526 // FIXME(aburka): use a real parser to deal with multiline attributes
527 fn partition_source(s: &str) -> (String, String, String) {
528 #[derive(Copy, Clone, PartialEq)]
529 enum PartitionState {
534 let mut state = PartitionState::Attrs;
535 let mut before = String::new();
536 let mut crates = String::new();
537 let mut after = String::new();
539 for line in s.lines() {
540 let trimline = line.trim();
542 // FIXME(misdreavus): if a doc comment is placed on an extern crate statement, it will be
543 // shunted into "everything else"
545 PartitionState::Attrs => {
546 state = if trimline.starts_with("#![")
547 || trimline.chars().all(|c| c.is_whitespace())
548 || (trimline.starts_with("//") && !trimline.starts_with("///"))
550 PartitionState::Attrs
551 } else if trimline.starts_with("extern crate")
552 || trimline.starts_with("#[macro_use] extern crate")
554 PartitionState::Crates
556 PartitionState::Other
559 PartitionState::Crates => {
560 state = if trimline.starts_with("extern crate")
561 || trimline.starts_with("#[macro_use] extern crate")
562 || trimline.chars().all(|c| c.is_whitespace())
563 || (trimline.starts_with("//") && !trimline.starts_with("///"))
565 PartitionState::Crates
567 PartitionState::Other
570 PartitionState::Other => {}
574 PartitionState::Attrs => {
575 before.push_str(line);
576 before.push_str("\n");
578 PartitionState::Crates => {
579 crates.push_str(line);
580 crates.push_str("\n");
582 PartitionState::Other => {
583 after.push_str(line);
584 after.push_str("\n");
589 debug!("before:\n{}", before);
590 debug!("crates:\n{}", crates);
591 debug!("after:\n{}", after);
593 (before, after, crates)
597 fn add_test(&mut self, test: String, config: LangString, line: usize);
598 fn get_line(&self) -> usize {
601 fn register_header(&mut self, _name: &str, _level: u32) {}
604 pub struct Collector {
605 pub tests: Vec<testing::TestDescAndFn>,
607 // The name of the test displayed to the user, separated by `::`.
609 // In tests from Rust source, this is the path to the item
610 // e.g., `["std", "vec", "Vec", "push"]`.
612 // In tests from a markdown file, this is the titles of all headers (h1~h6)
613 // of the sections that contain the code block, e.g., if the markdown file is
626 // the `names` vector of that test will be `["Title", "Subtitle"]`.
631 enable_per_target_ignores: bool,
635 source_map: Option<Lrc<SourceMap>>,
636 filename: Option<PathBuf>,
645 source_map: Option<Lrc<SourceMap>>,
646 filename: Option<PathBuf>,
647 enable_per_target_ignores: bool,
654 enable_per_target_ignores,
663 fn generate_name(&self, line: usize, filename: &FileName) -> String {
664 format!("{} - {} (line {})", filename, self.names.join("::"), line)
667 pub fn set_position(&mut self, position: Span) {
668 self.position = position;
671 fn get_filename(&self) -> FileName {
672 if let Some(ref source_map) = self.source_map {
673 let filename = source_map.span_to_filename(self.position);
674 if let FileName::Real(ref filename) = filename {
675 if let Ok(cur_dir) = env::current_dir() {
676 if let Ok(path) = filename.strip_prefix(&cur_dir) {
677 return path.to_owned().into();
682 } else if let Some(ref filename) = self.filename {
683 filename.clone().into()
685 FileName::Custom("input".to_owned())
690 impl Tester for Collector {
691 fn add_test(&mut self, test: String, config: LangString, line: usize) {
692 let filename = self.get_filename();
693 let name = self.generate_name(line, &filename);
694 let cratename = self.cratename.to_string();
695 let opts = self.opts.clone();
696 let edition = config.edition.unwrap_or(self.options.edition.clone());
697 let options = self.options.clone();
698 let runtool = self.options.runtool.clone();
699 let runtool_args = self.options.runtool_args.clone();
700 let target = self.options.target.clone();
701 let target_str = target.to_string();
703 debug!("creating test {}: {}", name, test);
704 self.tests.push(testing::TestDescAndFn {
705 desc: testing::TestDesc {
706 name: testing::DynTestName(name.clone()),
707 ignore: match config.ignore {
709 Ignore::None => false,
710 Ignore::Some(ref ignores) => ignores.iter().any(|s| target_str.contains(s)),
712 // compiler failures are test failures
713 should_panic: testing::ShouldPanic::No,
714 allow_fail: config.allow_fail,
715 test_type: testing::TestType::DocTest,
717 testfn: testing::DynTestFn(box move || {
736 if let Err(err) = res {
738 TestFailure::CompileError => {
739 eprint!("Couldn't compile the test.");
741 TestFailure::UnexpectedCompilePass => {
742 eprint!("Test compiled successfully, but it's marked `compile_fail`.");
744 TestFailure::UnexpectedRunPass => {
745 eprint!("Test executable succeeded, but it's marked `should_panic`.");
747 TestFailure::MissingErrorCodes(codes) => {
748 eprint!("Some expected error codes were not found: {:?}", codes);
750 TestFailure::ExecutionError(err) => {
751 eprint!("Couldn't run the test: {}", err);
752 if err.kind() == io::ErrorKind::PermissionDenied {
753 eprint!(" - maybe your tempdir is mounted with noexec?");
756 TestFailure::ExecutionFailure(out) => {
757 let reason = if let Some(code) = out.status.code() {
758 format!("exit code {}", code)
760 String::from("terminated by signal")
763 eprintln!("Test executable failed ({}).", reason);
765 // FIXME(#12309): An unfortunate side-effect of capturing the test
766 // executable's output is that the relative ordering between the test's
767 // stdout and stderr is lost. However, this is better than the
768 // alternative: if the test executable inherited the parent's I/O
769 // handles the output wouldn't be captured at all, even on success.
771 // The ordering could be preserved if the test process' stderr was
772 // redirected to stdout, but that functionality does not exist in the
773 // standard library, so it may not be portable enough.
774 let stdout = str::from_utf8(&out.stdout).unwrap_or_default();
775 let stderr = str::from_utf8(&out.stderr).unwrap_or_default();
777 if !stdout.is_empty() || !stderr.is_empty() {
780 if !stdout.is_empty() {
781 eprintln!("stdout:\n{}", stdout);
784 if !stderr.is_empty() {
785 eprintln!("stderr:\n{}", stderr);
791 panic::resume_unwind(box ());
797 fn get_line(&self) -> usize {
798 if let Some(ref source_map) = self.source_map {
799 let line = self.position.lo().to_usize();
800 let line = source_map.lookup_char_pos(BytePos(line as u32)).line;
801 if line > 0 { line - 1 } else { line }
807 fn register_header(&mut self, name: &str, level: u32) {
808 if self.use_headers {
809 // We use these headings as test names, so it's good if
810 // they're valid identifiers.
815 if (i == 0 && rustc_lexer::is_id_start(c))
816 || (i != 0 && rustc_lexer::is_id_continue(c))
823 .collect::<String>();
825 // Here we try to efficiently assemble the header titles into the
826 // test name in the form of `h1::h2::h3::h4::h5::h6`.
828 // Suppose that originally `self.names` contains `[h1, h2, h3]`...
829 let level = level as usize;
830 if level <= self.names.len() {
831 // ... Consider `level == 2`. All headers in the lower levels
832 // are irrelevant in this new level. So we should reset
833 // `self.names` to contain headers until <h2>, and replace that
834 // slot with the new name: `[h1, name]`.
835 self.names.truncate(level);
836 self.names[level - 1] = name;
838 // ... On the other hand, consider `level == 5`. This means we
839 // need to extend `self.names` to contain five headers. We fill
840 // in the missing level (<h4>) with `_`. Thus `self.names` will
841 // become `[h1, h2, h3, "_", name]`.
842 if level - 1 > self.names.len() {
843 self.names.resize(level - 1, "_".to_owned());
845 self.names.push(name);
851 struct HirCollector<'a, 'hir> {
852 sess: &'a session::Session,
853 collector: &'a mut Collector,
854 map: &'a hir::map::Map<'hir>,
858 impl<'a, 'hir> HirCollector<'a, 'hir> {
859 fn visit_testable<F: FnOnce(&mut Self)>(
862 attrs: &[ast::Attribute],
865 let mut attrs = Attributes::from_ast(self.sess.diagnostic(), attrs);
866 if let Some(ref cfg) = attrs.cfg {
867 if !cfg.matches(&self.sess.parse_sess, Some(&self.sess.features_untracked())) {
872 let has_name = !name.is_empty();
874 self.collector.names.push(name);
877 attrs.collapse_doc_comments();
878 attrs.unindent_doc_comments();
879 // The collapse-docs pass won't combine sugared/raw doc attributes, or included files with
880 // anything else, this will combine them for us.
881 if let Some(doc) = attrs.collapsed_doc_value() {
882 self.collector.set_position(attrs.span.unwrap_or(DUMMY_SP));
883 markdown::find_testable_code(
887 self.collector.enable_per_target_ignores,
894 self.collector.names.pop();
899 impl<'a, 'hir> intravisit::Visitor<'hir> for HirCollector<'a, 'hir> {
900 fn nested_visit_map<'this>(&'this mut self) -> intravisit::NestedVisitorMap<'this, 'hir> {
901 intravisit::NestedVisitorMap::All(&self.map)
904 fn visit_item(&mut self, item: &'hir hir::Item) {
905 let name = if let hir::ItemKind::Impl(.., ref ty, _) = item.kind {
906 self.map.hir_to_pretty_string(ty.hir_id)
908 item.ident.to_string()
911 self.visit_testable(name, &item.attrs, |this| {
912 intravisit::walk_item(this, item);
916 fn visit_trait_item(&mut self, item: &'hir hir::TraitItem) {
917 self.visit_testable(item.ident.to_string(), &item.attrs, |this| {
918 intravisit::walk_trait_item(this, item);
922 fn visit_impl_item(&mut self, item: &'hir hir::ImplItem) {
923 self.visit_testable(item.ident.to_string(), &item.attrs, |this| {
924 intravisit::walk_impl_item(this, item);
928 fn visit_foreign_item(&mut self, item: &'hir hir::ForeignItem) {
929 self.visit_testable(item.ident.to_string(), &item.attrs, |this| {
930 intravisit::walk_foreign_item(this, item);
936 v: &'hir hir::Variant,
937 g: &'hir hir::Generics,
940 self.visit_testable(v.ident.to_string(), &v.attrs, |this| {
941 intravisit::walk_variant(this, v, g, item_id);
945 fn visit_struct_field(&mut self, f: &'hir hir::StructField) {
946 self.visit_testable(f.ident.to_string(), &f.attrs, |this| {
947 intravisit::walk_struct_field(this, f);
951 fn visit_macro_def(&mut self, macro_def: &'hir hir::MacroDef) {
952 self.visit_testable(macro_def.name.to_string(), ¯o_def.attrs, |_| ());